Automatic weighing-machine



y G. ALMBERG. AUTOMATIC WEIGHING MACHINE.

I APPLlcATloN FILED 050.15. 19|9. 1,383,279. Ptllted July 5, 1921.

G. ALMfRG.

AUTOMATIC WEIGHTNG MACHINE.

APPLICATION FILED DEC.I5,1919.

Patented July 5, 1921..

5 SHEETS-SHEET 2.

G. ALMBERG. AlIToMATIc WEIGHING MACHINE.

1,383,279. APPLICATION FILED DEC. I5, |919. 5 5 SHEETS-SHEET 3 G.ALMBERG.

AUTOMATIC WEIGHING MACHINE. APPLICATION man Dsc. |51 |919.

Patented July 5, 1921 5 SHEETS-SHEET 4- l if I G. ALMBERG.

AUTOMATIC WEIGHING MACHINE.

APPLICATION FILED Dc.15. 1919.

1,383,279. v Patented July 5, 1921.

5 SHEEIS-SHEET 5L UNiTEDsTATEs AMTENTL oFFicE.

GUsrAvE ALMBERG, or cHroAGofiLmNors.

i lAUTOMA'IIG WEIGHING-MACHINE.

To Vall whom it may concern: 'l

Be it known that I, GUs'iAvE ALMBERG, a

citizen of the United States, residing atl Chi- Cook and State of haveinvented new and useful Im- Automatic Weighing-Mathe following is aspecifia combination and arrangement of parts Y to be hereinafterdescribed :and claimed, and iii order that the same may be betterunder,- stood, reference is had lto the accompanying drawings forming apart of this specification. l The preferred embodiment of the invention`has been disclosed, but it will be un'- derstood that various changesand modifications may be made without a departnre from the spirit andscope of the invention as claimed hereinafter.

In the drawings- Figure lis an elevation of the machine; Fig. 2 is aplan view thereof;

Fig. is a side elevation viewed from the right of Fig.

Fig. 4 is a side elevation partly in section,

of one of the units; n n l,

Fig. 5 is an enlarged elevation, partly in section of a detail;

F ig. 6 is a side elevation of the` parts shown in Fig. 5; Y

Fig. 7 is a view similar to `Fig. 6, but showing theA parts inanotherposition;

Figs. 8 to 10 are detailA views which will be referred to hereinafter,and

. l*l '11 is an elevation of a manual con-y trol device.

The drawings illustrate a and operated by single driving means. Thistype of machinevis of advantage for speed, as one person can handle thereceiving bags or sacks for both units, bysliding 'one sack intoreceiving position while removing 'the other. Furthermore, two :diie

Specification ofLetters Patent.

1machine conij posed of two complete units, set side-by-side PatentedJuly 5, 1921.

Application filed December 15, 1919. Serial No. 344,792.

ferent materials can be handled at `the same time so as to provide asupply of both continually. The output of themachine can be furtherincreased by providing additional units, or where a machine of limitedcapacity is desired, a single unit may be provided.

Referring specifically to the drawings, 15 denotes a post rising to asuitable height from a base 16. The `post carries, at the top a bracketmember 17 which supports lioppers 18, and said post also carries asupport 19 for a frame 20 supporting certain mechanism to be presentlydescribed. The frame 2O has bearings 21 for a horizontal shaft 22provided with va pulley 23 or other means whereby it is driven from asuitable power source. A drive belt 24 is shown.

At 25 are shown fragments of two receptacles serving as storagereservoirs for the material to be weighed. These receptacles are showndotted in Fig. 1. Each receptacle `communicates with a delivery trunk Y26 which is also open at the bottom.` Alongside opposite walls of the`trunk 26, on the inside thereof, are false walls 27 of-heavy butresilient material, which have sidewings 2S at .the-top eXtend-ingintoslots 29 of the adjacent walls of the trunk at the top thereof. Afastening, consisting of one or more rivets 30, is also provided, andthe walls have a normal tendency vto converge downwardly as shown inFig. 5. The walls 27 may be retracted or brought closer to the adjacentwalls of the trunk, by a screw 31 threaded through the latter andloosely connected to the former. The purpose of the walls 27 is todirect the material to the center of the trunk,gan'd also to varythearea thereof and thus control the amount .of material discharged.v n

The discharge of material from the trunk v26 is controlled by twoopposite` gates 32 whiclispread when they open, and come together whenthey close. These gates have side walls 33 which are located on theoutside of opposite walls of the trunk, and piovided with weights 34 tocause the gates `to close quickly. The gates are pivoted at a vcommon`point 35 to the opposite walls of the trunk. f

Beneath the trunk 26 is a weighing re ceptacle 36 into which thematerial drops wlienthe gates 32 are swung operi. This receptacle has apivoted. bottom gate provided with side arms 37 which are hung frompivots 38 on opposite walls of the receptacle. The weight of thematerial resting on the gate 37 swings the same to open position asshown dotted in Fig. l, when said gate is unlatched. Beneath thereceptacle is the hopper 18 into which the material drops for deliveryto the sacks, bags or other containers which are` to receive the weighedquantities of material.

From the weighing receptacle 86 rises a frame composed el side bars 39and a top cross bar 40. As shown in Figs. 2, 5, and 6, the cross bar 40carries bearing blocks ll secured by cotter pins 42, and seating onknife edge fulcrum blocks al carried by the front ends of two rearwardlyextending lever arms L3 connected by a cross bar l-l from which a scalebeam e5 extends. Thecross bar lll carries knife-edge blocks l-G at itsends seating on liulcrum blocks el7 carried by bracket arms L17supported by the frame of the machine. The beam Ll5 passes through astroke-limiting device 48 held by irame brackets a9, and is provided atits outer end with a weight support 50 and a leverage adjusting screw5l, thesel parts being of standard construction. Thus 'when a weight, asshown at 52, is on the support 50, this end of the scale beam Ll5 isdown as clearly shown in Figs. 3 and 4, the receptacle '86 now'beingempty.

The gates 32 hereinbefore described control the discharge of materialfrom the trunk 2G into the .veighing receptacle 236, and their operatingmeans will now be described.

pposite one of the side walls ot the trunk 26 is positioned a plate 53which is vertically slidable under a guide 5l The lower portion ot thisplate has lateral wings provided with curved recesses 5G to 'form camsfor pins projecting from the gate sides 3S. Thus, whenthe plate 55Emoves upwardly, the galiesb32, through the cam recesses and the pins,are made to spread to -open position, and 'when the plate movesdownwardly the gates come Vtogether and close. The mi'eration ol openingand closing the gates is therefore made positive, and they cannot opentoo far, nor slam together' and partly open again from the recoil,

The slide plate 53 is operated by a link 5S pivoted'thereto at 59 andnormally hanging :tree trom the pivot. The link 5S has an outstandingpin orV other abutment (3() near the top to engage the edge of the slideplate, and thus keep the link from swinging to the left of its normalpendent position shown in Fig. 6, and at the bottom ot the link is asmall knob or other abutment 6l which is in the path of, and thusengageable by the lever 62 operated by a means to be presentlydescribed. lVhen this lever swings upwardly, it presses against theabutment 61, and through the link 58 the plate 53 is operated to openthe gates 82.

To a lug G3 on the trunk 2G is pivoted, as shown at (ll, a latch lever65 having its free end beveled as shown at G5"L to form a cam surface.This lever is held next to the slide plate 52S by a screw G6 passingthrough a slot 67 in the lever to permit arcuate motion th reot'. To thewall ot the trunk 2G is pivoted as shown at G9, a de tcnt G8 weighed at70 and having a projecting lever arm 7l. The detent has the shape of anangle bar as shown in Figs. 5 and 6. lhen the link 58 is moved upwardlyby the lever 62 to open the gates 32, the lever 65 will also riseagainst the detent G8 until the latter slips and catches the same asshown in F ig. 7. The gates are now locked in open position, and so helduntil a linger 72`earri'ed by the scale beam arms i3 descends with saidarms as the scale beam 45 tilts, and bears down on the end 7l of thedetent to trip the latter oil the latch lever G5, whereupon the gatesare lett ireeto swing closed.

The lever G2 is operated i'rom the drive shaft 22, the latter carrying aspool 73 between the ends of whichthe lever seats. The lever 62 ispivoted at 74- tolthe frame of the machine. Across the spool extends a4pin 75 which periodically engages the `lever and lifts the same.

It will now be'nnderstood that the material which is discharged bythevopening ot the gates 32, is cut off by the closing thereof as soon asthe weighing receptacle 36, carried. by the scale beam i-5, drops iromthe weight of the material it receives the `tips the scale beam, thismovement of the scale beam actuating the detent G8 through the fingers72 as hereinbefore described. The following means are provided Fordlscharging the material fromthe weighing receptacle. l

It will be noted in Fig. 3 that one end oli the spool 73 carries a camdisk 7G having drops 7 G and 7G", respectively, Against the edges olthis cam bears a "follower 77 pivoted at 78 to the frame ot the machine,and held against the cam by the action ojlf a rockerv arm 79 weighted atone'end as shown at 80. The connection.between the parts 77 and 79 ismade by a screw Hl, so as to permit the :lollower to movelaterall'v'into the drops or depressions ol the disks 76. When thefollower rides out of a depression, the parts move to the dotted .lineposition shown in Fig. l0, causing the rocker arm 7.() to tilt by reasonof the pin andslot connection with the follower.

As described hereinbefore.

the gate 87 is swung open by the weight oi the material in thereceptacle 8G, and hence it is necessary to have a means for holding thegate closed during the filling and weighing operation. F or thispurpose, latch arms extend. 'from lOl) lll)

lli

iso

' sion 76n `the dotted position shown in vated the lever 62 to open thegates 1,asa,279

the bracket members 87l of the gate, they being pivoted to vthe bracketmembers, as shown .at 88a, andconnected at their free ends by a crossrodk 84. J ust back of the receptacle 86, each armv88 has a bottom lug85, which latter, when thegate 87 is closed,

f lies back of a keeper strip 86 secured to the back ofthe receptacle,whereby the gate is held closed. The keeper strip is reduced at its`ends. to provide a better seat for the latch arms. The forward end ofthe rocker' arm 79 extends under the cross rod 84 at a pointintermediate its ends,` when the follower slips into the cam deprestothe full line. position shown in Fig. 10, the rise of the front end ofthe rocker arm 79 causes the latter to strike and lift the cross rod 84.This, of course, disengages the lug 85 from the keeper strip 86,whereupon the gate 87 is unlocked and permitted to be swung ,open by theweight of the material in the weighing receptacle 86,

and on its recoil it will be prevented from returning to closingposition nearer' than Fig. 4, by the front of the keeper the continuedrotalug 85 which is now in 'strip 86. Bythis time,

f tion of the power-driven cam 7 6 again causes the follower 77 toswing, but it now slips into the depression 7 6b. This movement of thefollower causes the arm 79 to strike the cross rod 84 and to trip thelatch arms 88 to elevate the lug 85 above the keeper strip 86, whereuponthe and gate 87 is permitted to swing closed by its own weight. i

In operation, the pulley 28 receives motion .from a suitable powersource and it is driven in the direction of the arrows in Fig. 8.Assuming that the spool. 78

t ie material drops from the trunk 26 into the weighing receptacle 86.As soon as the weight of the material the action of the linger 72 ashereinbefore described, close and cut off the flow of material intothereceptacle. The cam depression 7 6 and 76b now come into action torelease and then close the gate 87 of the receptacle as hereinbeforedescribed, and the material-drops into the hopper- 18 beneath which willbe held. the. bag or other container to receive thematerial. Thedischarge of material from the receptacle 86 causes the scale beam45 to.tilt back, raising `the linger 72 clear of the detent arm 71 to permitthe gates 82 to swing open once more and allow the material in the`trunk 26 to again discharge into the weighing ref ceptacle 86.

A" safety device is also provided to make certain that `the gates 82will not swing open while the gate 87 vis open.' lReferring to' 9 .itivi/1lb@ .noted that one Figs, l, 4 and and hence latch arms are freedvhas actu-v in the receptacle 86 tilts the scale beam 45, the -gates 82,through crank`96 has a side pin of the side bars 89 has afpivot pin 87on which is hung a depending link 88 pivotally connected at its lowerend to one of the flatch arms 88, as shown at 89. Near its upper end,Vthe link 88 has a laterally projecting abutment or pin 90 which passesthrough a slot 91 in one of the bars 89 (see Fig. 9), and engages oneedge of the link 58, this edge having a concave curvature as shown inFigs. 6 and 7 NV hen the parts are in normal position, the pin 90 seatsalongside the link 58 without affecting the latter, but when the gates82 open as shown in full lines in Fig. 7, the link 58 only movesupwardly, the pin 90 remaining as before. Now as thev weight of thematerial in the receptacle 86 gradually causes the latter to descend,the link 88, with itsu pin 90, will also lower, the pin assuming thedotted position in Fig. 7. The receptacle 86 is now `fully weighed, thegates 82 have already' -be out of the path of the lever 62 while thegate`-87 is down, so that the chances of accidental opening of the gates82 by the lever 62 will be practically impossible.

The part 92 in Fig. 4 is a hook pivotally supported by the frame 2O andengageable with a pin 92 on the side of the receptacle 86 to keep the.latter from swinging outwardly during rapid action and causingdisengagement of the parts 41 and 41a.

Figs. 1, 8 and 11 show a manual control designed to throw the machineout of gear, leaving the pulley 28 and shaft 22 running until themachine is again to be operated. A long push rod 98 supported by abracket 94 actuat'es two cranks 95 and 96 fast on a shaft 97 at therearof the machine. The 98 which is located beneath the weight 80. Thefull line position of tho rod 98 in Fig. 11 shows the pin 98 has pushedup the weight 89. This draws the follower 77 out ofreach ofcam 7 6,y andthe latch disengaging rocker arm 79 out of reach of the cross rod 84, sothat the gate 87 of the weighing receptacle 86 cannot be moved. When theparts are moved to the dotted line position in Fig. 11, the pin 98 isfree of the weight 80, whereby the parts 77 and 79 are allowed tocoineback to their normal position. The rod 98 is locked against a returnmovement by being flexed `sufficiently to bind in its bearing 94 on thebracket 94, this fiexure being due to the weight of the parts bearing onthe pin 98.

I claim:

1. Inl a. weighing machine, a material feed.

trunk, a pair of pivoted gates controlling the trunk outlet, a slidablemember supported by the sides of the trunk and having cam recesses,outstanding pins on the gates seating in the recesses, said recessesbeing shaped to open the gates when the slidable member moves in onedirection and to close the gates when moved in another direction, meansfor operating'the slidable member, a latch mechanism for holding thegates open, a weighing receptacle into which the trunk discharges, and apivoted scale beam carrying said receptacle, said scale beam havingmeans for controlling the latch mechanism.

2. In a Weighing machine, a material feed trunk, a pair of pivoted gatescontrolling the trunk outlet, a slidable member supportedlbythe sides oithe trunk and having cam recesses, outstanding pins on the gates seatingin the recesses, said recesses being shaped to open the gates when theslidable member moves in one direction and to close the gates when movedin another direction, means for operating the slidable member, a latchmechanism for holding the gates open, a Weighing receptacle into whichthe trunk discharges, a pivoted scale beam carrying said receptacle,said scale beam having means `for controlling' the latch mechanism, adischarge gate for the Weighing receptacle, and a latch mechanism forsaid discharge gate.

3. In a Weighing machine, a material feed trunk, a pair of pivoted gatescontrolling the trunk outlet`r a slidable member supported by the sidesof the trunk and having cam recesses, outstanding pins on the gatesseating in the recesses, said recesses being shaped to open the gateswhen the slidable member moves in one direction and to close the gateswhen moved in another direction, means `for operating the slidablemember, a latch mechanism for holding the gates open, a Weighingreceptacle into which the trunk discharges, a pivoted scale beamcarrying said receptacle, said scale beam having means for controllingthe latch mecha-- nism, a discharge gate for the Weighing receptacle, alatch mechanism for said disn charge gate, operating means for the lastmentioned latch mechanism, and a powerdriven shaft having means forcontrolling said operating means.

l. In a Weighing machine, a Weighing receptacle. a pivoted scale beamcarrying said receptacle, a discharge gate for the receptacle, amaterial supply receptacle posi.- tioned to discharge into the Weighingreceptacle, a gate controlling the discharge from the supply receptacle,controlling means for the gates operable to open the same in alternateorder, a power-driven shaft for operating the controlling means of thefirst mentioned gate, and means controlled by the first mentioned gatefor preventing opening lthe gates operable to of the second mentionedgate While saidlirst mentioned gate is open.

5. In a Weighing machine, a Weighing receptacle, a pivoted scale'beamcarrying said receptacle, a discharge gate for the "receptacle, amaterial supply receptacle positioned to discharge into the Weighingreceptacle, a gate controlling the discharge from the supply receptacle,controlling means for open the same in alternate order, the controllingmeans of the second mentioned gate being operable by the movement oitthe Weighing receptacle, a power-driven shaft for operating thecontrolling means of the first mentioned gate, and means controlled bythe first mentioned gate for ypreventing opening of the second mentionedgate While said first mentioned gate is open.

G. In a Weighingmachine, a Weighing receptacle, a pivoted scale beamcarrying said receptacle, a discharge gate for the receptacle, amaterial supply receptacle positioned to discharge into the Weighingreceptacle, a gate controlling the discharge from the supply receptacle,cont-rolling means for the gates operable to open the same in alternateorder, a power-driven shaft for operating'the controlling means-of thefirst mentioned gate, and means for placing the controlling means oi thefirst mentioned gate in inoperative position.

7. In a Weighing machine, a Weighing receptacle, a pivoted gate for theoutlet of said receptacle, a latch for holding the gate closed, a latchreleasing means, a power driven shaft having means for periodicallyactuating said releasing means, a `'iced receptacle positioned todischarge into the Weighing receptacle, a gate controlling the dischargefrom the feed receptacle, and means Vfor placing the aforesaid latchreleasing'means in inoperative position.

S. In a weighing machine, a material supply receptacle, a gatecontrolling the discharge from said receptacle, a slidable'member, meansassociated With said member for operating the gate, a latch leverconnected to the slidable member, a pivoted detent engageable bythelatch lever when the gate is open for holding' the same in openposition, a weighing receptacle into which the supply receptacledischarges, a pivoted scale beam carrying the Weighing receptacle, andmeans carried by the scale beam for tripping the aforesaid detent.

9. In a Weighing machine, a material supply receptacle, a Weighingreceptacle into which the supply receptacle discharges, a gatecontrolling the discharge from the supply receptacle, a discharge gatefor the Weighing receptacle, means for operating the gate of the supplyreceptacle, a latch mechanism for holding the gate of the Weighingreceptacleclosed, `and a power driven shaft having means for actuatingthe aforesaid gate operating means and the latch mechanism in alternateorder.

l0. In a Weighing machine, a material supply receptacle, a weighingreceptacle into which the supply receptacle discharges, a

gate controlling the discharge from the supply receptacle, a dischargegate from the weighing receptacle, means i'or operating the gate or' thesupply receptacle, a latch mechanism tor holding the gate of theWeighing receptacle closed, a power driven shaft having means foractuating the aforesaid gate operatin means and the latch mechanism inalternate order, and means controlled by the movement of the ,Weighingreceptacle gate for pre vexiting opening of the supply receptacle gateWhile said Weighing receptacle gate is open.

ll. In a Weighing machine, a material supply receptacle, a weighingreceptacle into which the supply receptacle discharges, a gatecontrolling the discharge from the supply receptacle, a discharge gatefor the Weighing receptacle, means for operating the gate of the supplyreceptacle, a latch mechanism 'for holding the gate of the Weighingreceptacle closed, means for actuating the aforesaid gate operatingmeans and the latch mechanism in alternate order, and means controlledby the movement of the Weighing receptacle gate for preventing openingof the supply receptacle gate While said Weighing receptacle gate isopen.

l2. In a Weighing machine, a material supply receptacle, a Weighingreceptacle into which the supply receptacle discharges, a gatecontrolling the discharge from the supply receptacle, a discharge gatefor the Weighing receptacle, means gt'or operating the gate ott thesupply receptacle, a latch mechanism for holding the gate of theWeighing receptacle closed, apower driven shaft having means foractuating the aforesaid gate operating means and the latch mechanism inalternate order, a latch for holding the supply receptacle gate in openposition, and means operated hy the weighing receptacle for trippingsaid latch.

In testimonyivhereof I aiiix my signature.

GUsTavn ALMBERG.

